A collection pit (sump)
We set a basin at the lowest point of your basement or crawl space, where incoming groundwater naturally collects.
Bay Area Sump Pump Installation · Licensed · 13+ Years
Sump Pump Installation in the San Francisco Bay Area
Bay Area winters and high water tables push groundwater under your home. A properly installed sump pump collects it and pumps it away — keeping your basement or crawl space dry and mold-free.
Free inspectionLicensed (CSLB #1022608)Basement & crawl-space drainage13+ years experience
Free on-site estimate · No pressure · We come to you
Why It Matters
Keep Groundwater Out
of Your Basement & Crawl Space
The Bay Area's wet winters, clay soils, and high water tables mean groundwater collects under a lot of homes. Once water pools in a basement or crawl space, it doesn't just sit there — it soaks framing and insulation, feeds mold and wood rot, and invites pests, and the damp air rises into the rest of the house.
A sump pump is the fix: it sits at the low point, collects the water that flows in, and pumps it away from your foundation before it can do damage. It's often paired with a french drain to channel water to the pump — and when water has already damaged the insulation below, with crawl space insulation removal to clear it out.
- Keeps basements and crawl spaces dry
- Prevents flooding and water damage
- Protects framing from rot and mold
- Pumps groundwater away from your foundation
- Reduces damp, musty air in the home
- Pairs with french drains for full drainage
How It Works
How a Sump Pump
Keeps Your Home Dry
A sump pump system is simple, but every part matters. Here's what a proper installation includes and does.
The pump
As water rises in the pit, a float switch triggers the pump — which lifts the water out and sends it away from the house.
A discharge line
The water is carried through a discharge line to a safe spot well away from the foundation, so it can't seep back in.
A check valve
A check valve keeps pumped water from flowing back down into the pit, so the pump isn't fighting the same water twice.
Backup options
Since storms and outages often come together, we can add a battery backup so the pump keeps running when the power doesn't.
Works with french drains
Paired with a french drain, the drain channels water to the pit and the pump clears it — a complete drainage system.
Do You Need One?
Signs Your Home
Needs a Sump Pump
Water problems under the house tend to show up as smells and damage before you ever see standing water. Watch for these.
Standing water or flooding
Water pooling in the basement or crawl space — especially after rain — is the clearest sign you need drainage and a pump.
Damp, musty odors
A persistent musty smell rising into the house usually means moisture is sitting under it and feeding mold.
Water stains or efflorescence
Stains, dark marks, or white mineral crust on foundation walls show water has been coming in.
Mold or wood rot
Mold on framing or soft, rotting wood under the house points to a moisture problem a sump pump helps solve.
A low-lying or high-water-table lot
Homes at the bottom of a slope or over a high water table collect groundwater and benefit most from a pump.
A history of flooding
If your basement or crawl space has flooded before, it will again without drainage — a sump pump is the safeguard.
How We Work
Our Sump Pump Installation Process
A sump pump only protects your home if it's placed and plumbed right. Here's how we handle every install.
Free inspection
We inspect your basement or crawl space, find where water collects and how it's getting in, and confirm the right drainage solution.
Set the sump pit
We dig and set the sump basin at the low point where groundwater naturally flows, so the pump catches it at the source.
Install pump & discharge
We install the pump, run the discharge line to a safe outlet away from the foundation, and fit a check valve so water can't flow back.
Add drainage if needed
Where water needs help reaching the pit, we integrate a french drain — and can add a battery backup for storm outages.
Test & walkthrough
We test the pump and float switch, confirm it clears water properly, clean up, and show you how it works and what to check.
Free inspectionLicensed (CSLB #1022608)Drainage done right
Why Attic Pros
The Bay Area's Trusted
Drainage & Sump Pump Team
For over 13 years, Bay Area homeowners and businesses have trusted us to keep their basements and crawl spaces dry — because we solve the whole water problem, not just drop in a pump, and stand behind the work.
- Licensed contractor (CSLB Lic. #1022608)
- SPCB-registered for pest-related work (Co. Reg. #9901)
- Diamond Certified & Angi Super Service Award winner
- Independently reviewed — verified Google ratings
- Free, no-obligation on-site inspection
- Local team with 13+ years under Bay Area homes
Real Customers, Real Results
Trusted by Bay Area Homeowners
4.8
★★★★★
Based on 1,900+ verified Google reviews — trusted for sump pumps, drainage & home services across the Bay Area
Google Review
★★★★★
Tom is a professional and did a very detailed inspection, also gave additional details to prevent in future infestation.
ajit rathi
Google Review
★★★★★
My wife and I found mice droppings in our kitchen cabinet. We reached out to Attic Pros and was connected with Tom. He was very professional and thorough with his inspection. We went through our crawl space and attic. Gave us a full rundown of issues/problems we may be experiencing now and potentially in the future. Thanks for your expertise and quick follow up with the quote and service Tom.
Will Le
Google Review
★★★★★
These guys are awesome. Super clear comms to schedule, then received an extremely thorough consultation. We eventually decided to go with them as other shops in the area didn't communicate as well as Attic Pros.
Pedro Kroeff
Google Review
★★★★★
Tom from Attic Pros was great to work with! He was friendly, professional, and thorough during the inspection. He clearly explained everything he found and answered all of my questions. The whole process was straightforward. Thank you, Tom!
Daria Baevski
Google Review
★★★★★
Finding out we had a rodent infestation for the first time was incredibly stressful, but Attic Pros made the entire process so much easier! Jeremy was very knowledgeable when help preparing the estimate and the work that needed to be done. Their team that came to perform the work—Nico Otten, Juan Rodriguez, and Antonio Lopez—were amazing from start to finish. Communication was fantastic right from the beginning. The crew was super fast, highly efficient, and left everything very clean after sanitizing our attic, crawl space, and garage. They definitely gave us total peace of mind. They were also able to finish in one day!!
Annie M
Google Review
★★★★★
Our small cottage has a very narrow attic entrance. Denis from Attic Pros was willing to try and was able to enter to clean, vacuum, and replace the old insulation. Very professional, access areas were well shielded and protected. Powerful vacuum and clean up well after themselves.
Morgan Yang
QUESTIONS, ANSWERED
Frequently Asked Questions
Straight answers to the questions people actually ask about sump pumps — when you need one, how they work, and backup power. Still unsure? Our team is happy to help.
Still have questions?
Talk to our team — we're here to help.
(800) 543-0382If your basement or crawl space takes on water — or your home sits over a high water table or at the bottom of a slope — then yes, a sump pump is the reliable way to keep it dry. Between wet winters and clay soils, groundwater is a real issue here, and standing water under a home leads to mold, rot, and pests if it isn't pumped out.
Both. Sump pumps are just as important in crawl spaces as basements — a damp crawl space feeds mold and rot and sends humid air up into the house. We install them in whichever low point collects the water.
Water flows into a pit (the sump) set at the low point of the space. As it fills, a float switch turns the pump on, and the pump lifts the water out through a discharge line to a spot well away from your foundation. A check valve keeps that water from draining back in.
That's exactly when you need it most, which is why we can add a battery backup. It keeps the pump running through an outage so a storm that knocks out power doesn't also flood your home.
Yes — they're a natural pair. A french drain channels groundwater to the sump pit, and the pump clears it away. For homes with a real water problem, installing both gives you a complete drainage system rather than a partial fix.
A quality sump pump typically lasts several years, and a little maintenance helps — keeping the pit clear of debris, testing the float switch, and checking the discharge line. We'll show you what to check and when at the walkthrough.
Most residential sump pump installations are completed in a single visit. Timing depends on the space, whether a french drain is added, and how the discharge line has to run. We'll give you a clear timeline with your estimate.
Usually groundwater from rain and a high water table, sometimes made worse by poor grading, downspouts draining toward the house, or plumbing leaks. Part of our inspection is finding the source, so the pump and drainage actually solve the problem.
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Tell us what you're seeing under your home — water, damp, or musty air — and we'll inspect the drainage, recommend the right sump pump system, and give you a clear, no-pressure estimate.